Wrench.



EI|DWIN NILSSON, DIE CHICAGO, ILLINOIS.

WRJENGH.

Specificatioxi qf Letters Patent.

]Palben1lsed Den. 12, 1016 Application filed Inne 15, 1.9141. Serial N0. 845,179.

T all whom z't may concem:

Be it known thai; I, EDWIN NI LSSON,}L citizen of Sweden, residing at C h1c ago, 1n the county of Cook and State 0f Ill1no1s, have invented certain new and 'useful llmpro vements in Wrenches, of which the follow1ng is a specifieation.

This invention relates to improvements m wrenches and its object is !b0 produce a, 0 wrench which can be very quiokly and ea sfly adjusted t0 its WOIk and the parts of Wh1ch,

in use, operate as a unit and Without danger of slipping 01 losing their.relative ad ustment.

With the foregoing and other objects in view the invention consists in t-he combination and arrangement 0f parts to be hereinafter fully described in the following spec1- fication, pointed out in the claim and illns- 0 trated in the accompanying drawing, Wh1c'h forms a part 0f seid specification and in which Figure 1 is a, side elevation of my improved Wrench. Fig. 2 is a similar view 5 partly in section. Fig. 3 is zu rear elevation.

'Fig. 4 is an enlarged portion of the t0ol 'partly in section.

Like reference characters indieate corresponding arts throughout the several views. 0 The referen*ce numeral 1 designates the bar 01- lever Which is formed with the rack 2 and with the integral head er stationary jaw 3 and provided with a handle 4.

5 designates the movablejaw which is 5 slidable upon the bar 1 and is formed With an opening 6 to reeeive this bar, this opening being of greater cross-section than seid bar, forming sp'a'ced-apart Walls 7 7, between which is received a, tootlied-bridge 8, and w which Walls are connected by a'pin 11 secured to the movable jaw *5 said br'idge being mounted and pivoted upon said pin. Seid bridge has a notch 9 in which one end 0f a spring 10 is seated, the body of the spring being compressed between the bridge and a pin 11 connebting'the alls 7 7 and the Opposite end of seid spring being engaged by a metal loop 12 which conneets the Walls 7, 7. A handle 13 is carried by the bridge 8. Normally the teeth f the bridge firmly engage the teeth 0r rack 2 of the bar 1 .and es the g1rippini ends o1f the jaws 3, 5 'f me upon the side 0f t e bar 1 oppesite m tlme said teeth and rackthe strain caused by use of the' Wrench does not te-nd to move ehe teeth 0f the bridge With relation to the rack 2. A pull upon the lever 01 bar 1 in one direction Will force the gripping side 0f the jaw 5 against the bar and a pull upon said bar in the opposite direction Will force the teeth of bridge 8 and rack 2 more closely together. thus always insuring a positive purchase 0f the jaws 3, 5 upon the WOI'k, eliminating Slipping 01 independent movement of the jaws in use. T0 re-adjust the jaws the jaw 5 is moved into the positio'n sh'own dotted in Fig. 4 of the drawings by moving the handle 13 toward the jaw 3 thus disengaging the teeth of the bridge 8 from the rack 2 and compressing the spring 10 finnly between pin 11 and the bridge und. in this position the movable jaw may be adjusted as desired upon the bar.

What is claimed is:-

A wrench including a -toothed bar having a fixed jaw, a, movable jaw having an opening receiving said toothed bar, said op ening being 0f a greater c'ross-section than said bar forming spacecl-apart Walls having extending therethrough a transverse pin extending from sa id movable'jaw seid toothed bar being received between seid walls and a bridge mounted and pivoted upon seid pin, aloop secured to the sides 0f seid movable jaw and npraised therefrom and positioned transversely of seid movable javv, fixed-jaw bar and bridge, and a resilient member looped under seid transveme pin with one end ex- 4 tended under said loop, the other end 0f seid spring having connection with seid bridge, delivering pressure thereupon, the teeth of seid bridge being in engagement with the teeth of said fixed jaw bar, normally, ancl the gripping ends of said movable and fixed ja.ws being upon the side of seid fixed-jaw bar opposite to seid beeth, whereby the strain resulting when the wrench is in use, does not tend to dislodge the teeth of said bridge from seid fixed-jaw bar teeth.

In testimony that I claim the foregoing as my own I have hereto aflixed my signature in the preset1ce of two subscribing witnes'ses.

EDWIN NILSSON. Witnesses:

HERMAN ANDERSON, CATRINES ]DE HAAN. 

